Recording-manometer.



PATENTED JUNE 16, 1908.

F. N. BONNET.

RECORDING 'MANOMETER.

APPLIGAIION FILED 1113.2, 1907.

3/ 154mg .53Y

Snowdon mi h1 uns FREDERICK N. CONNET, OF PROVIDENCE, RHODE lISLAND.

BE CORDING-MANOMIE TER.

Specication of Letters Patent.

Patented June 16, 1908.

Application med robrwy 2, 1907. snm No. 355,417.

To all whom it/may concern:

Be it known that I, FREDERICK N. CON- Nn'r, a citizen of the United States, residin at the city of Providence, in the county o Providence and State of Rhode Island, have invented certain new and useful Improvements in Recording-Manometers; of which the following is a specification, reference beinghad therein to the accompanying drawlng.

This invention relates to a recording manometer and has for its object to provide a simple and practical instrument for indicating and automatically recording the flow of liquids or gases through a given aperture,

said instrument being controlledpin its ac tion by the difference in pressures at two distinct oints in the main supply tube. To ac.- comp ish this purpose I have adopteda pipe or tube similar in construction to that commonly known as the Venturtube, de-

'scribed` in .United States Patent No. 381,373,

April 17, 1888, and have connected to said tube twochambers one communicating with the up'stream or high pressure side of the tube, and the second chamber communicating with the throat or reduced portion of said tube. These chambers communicate with each other, and in each is a float supported on a column of mercury, said floats being connected through suitable mechanism to operate a recording pen and move the same over the face of a continuously rotating record sheet. This device may be operated to continuously record the amount of flow passing through the pipe so that the quantity passing through at any period may be readily ascertained.

This invention is fully set forth in this specification and more particularly pointed "out in the appended claims.

In the drawings: Figure l-is a front elevation of my manometer connected up to a Venturi tube with the front plate removed, showing the Arecording sheet and the recording pen operating mechanism, also showing a portion of one of the chambers in section. Fig. 2-is a side elevation ofthe instrument partly in section.

Referring to the drawings at l is the base or frame of the manometer on which is sup- ,orted a pair of cylinders 2 and 3, c linder 2 eing set somewhat higher than cy inder 3. At the lower end-of each ofthese cylinders is the tapered aperture 4' and 5 communicating with the pipe 6 by which -pipe the two cylinders are connected together. The upper end of cylinder 2 is provided with a short neck 7 communicating with the circular opening 8 and a stand-pipe 9 extends upward from said opening 1n line with its neck 7 making the whole cylinder self-contained and water-tight. The cylinder 3 is provided -with a long neck 10 communica-ting with a circular chamber 11 corresponding to and in line horizontally with the circular chamber 8, and a stand-pipe 12 extends upward from the openingvll 1n line withits neck 10, making this cylinder also tight against a pressure of water.

At 13 is a horizontal shaft extending from the circular chamber 11 through the circular chamber 8 and into the record casing 14. This shaft is provided vwith a suitable bearing l5 between the two chambersand a stuffing box 16 as it passes from the circular chamber 8 into the record casing. A gear 21 located in this chamber 8 is mounted on and fixed to this shaft, and a similar gear 23 located in chamber 11 is also mounted on and fixed to this same shaft.

At 17 and 18 are two floats adapted to restl on and be moved vertically by the change in the levels of the mercury in both of the cylinders. To the u per end of float 17 is connected a long racii 20 adapted to engage one side of the gear 21, while to the float 18 is also connected a similar rack 22 adapted to engage the opposite side of the gear 23. When either of the floats is way u the rack extends into its stand-pipe and wlien the float is way down the bottom of the same rests upon the lower end of its cylinder. g

The record sheet 24 may be ruled'or arranged in any convenient manner, the one shown is divided up into twenty-four equal.

parts by radial` nes, representing the twenty-four hours of the day It is also marked with a plurality of concentric circles representing a definite number of gallons or any other units of measure which may be adpoted. This record sheet issecured in any convenient way to a disk 25 which disk is mounted on the shaft 26 to be continuously rotated by clock mechanism, not shown. The recording pen 27 is mounted inthe upper end of a long finger 28,l which finger is pivoted at 29 a short distance above its lower end to the rocker arm 3() and is held up into position againstl the stop 5in 31by means of the light coil spring 32. IByv actuating cam is mounted on the shaft 134 and is rotated by the movement of the floats.

Another feature of the invention is that the communication between the two cylinders is automatically shut off by either of the floats when they are in their lowest position.`

Any suitable valve may be used for this purposebut I have referably tapered the Ottom portion of tie floats whereby the same are adapted to fit into the corresponding recess at 4 o'r5 in the bottom of the float chambers effectually sealing the passageway so as to .prevent a further actlon of the pressure on the mercury after the floats have reached the limit of their stroke.

It is found in practice to.be very difficult to .form the cylinders of a regular size throughout their length and to make both ofexactl the same diameter. This difference, which may be due to faulty workmanship or otherwise, ma be com ensated for in the formation of t e cam t atcontrols the movement of the recording fin er.

In the operation of this device t e liquids or gases flow through the tube 40 in the direction of the arrow the up-stream side of the tube is connected at 4l by means of pipe 42 to the cylinder 3, while the throat is connected at 43 by the pi )e '44 to' the cylinder 2. When there is .no ow through the tube the pressure at allI oints of the tube is, of course, equal and t 1e floats in both qylinders are at the same height. As soon as the flow begins the pressure in the throat is decreased and becomes less than that at the point 4l, therefore the mercury in chamber 3 is forced downward by the excess of pressure on this side, raising the mercury -and float in the opposite chamber 2 a eorrespondi amount. As these float-s move one up an one down they act with corresponding force through their respective racks and gearson' the shaft to rotate the actuati cam in.proportion to their movement, an as this cam revolves in the direction indicated by the arrow the contact roll is caused by the weight 37 to follow the face of said cam and so control the outward movement vof the recording finger across the face of the record sheet. The reverse action of the finger takes place when the cam is rotatedin the opposite direction. The greaterthe amount of water flowing through the tube the greater the dill'crencc iri the height of the floats and consequently the greater the movement of I*olperated the cam and the recording finger from the center of the disk. The quantity, whether constant or varying, i`s clearly and accurately recorded on each recor sheet for a predetermined period. These sheets, when by the mechanism described, s iould be removed and replaced by a fresh one every twenty-four hours, the one removed containing the record being filed away for reference.

Having thus described my invention, what I claim as new and desire to secure by Letters Patent,y is:

1. In a device of the character described, the combination of a main ipe, a pair of adjacent receptacles, a rotata le shaft adapted to ass from one receptacle into the other, an( means in both of said receptacles adapted to act upon said shaft to rotate the same, 'said means being actuated by the difference in pressure at two points in said main.

2. In a device of the character described, the combination of a main pipe, a pair of adjacent receptacles, a dividing wall between said receptacles, a rotatable shaft adapted to ass through said wall to communicate Wit each of said receptacles, and means in both of said receptacles actuated by the difference in pressure at two points in said pi e adapted to act upon said shaft to rotate tiie same.

3. In a device of the lcharacter described, the combination of a main ipe, a air of adjacent receptacles, a rotata )le sha vt adapted to ass from one receptacle into the other, ant a float in each of said receptacles adapted to act u on said shaft to rotate the saine, said floats icing controlled in their action by the difference in pressure at two points in said main.

4. In a device of the character described, the com'bination of a main pipe, a air of adjacent receptacles, a `dividm wa between said receptacles, a rotatable s aft adapted to pass through said wall to communicate with each of said receptacles,means in both of said receptacles actuated bythe difference in pressure at two points in said pipe adapted to act upon said s aft to rotate t e same, and means actuated by said shaft for showing the amount of water which passes through said main.

5. In a device of the character.dcscribcd, the combination of a main ipe, a pair of adjacent receptacles adapteti) to retain fluids of different pressurcsa float in each receptacle, a wall between said two receptacles to separate the pressures, and a rotatable shaft for transmitting lthe motion of said fioats, said shaft being adapted to pass through said wall into each of said receptacles whereby both floats may engave and act upon it.

6. In a recording evice, the combination of a rotatable record sheet, a tracer, a rotatable cam adapted to control the movement said floats will lnove the tracer across the face' of the record sheet, a-nd means whereby the communication between said cylinder is automatically closedwhenone of' the floats is in its extreme down position.

8'. In a recording device, the combination of a main sup ly pipe, a pair of pressure containing cylint ers communicating with each other at their lower ends, a float in each cylinder positioned by the difl'erence between the pressures at two points in the main pipe,

means actuated by'said floats to continuously record the quantity passing through said main pipe, and means whereby the communication between said cylinders is automaticallyclosed when one of the floats is in its down position. .Y

9. In a recording device the combination of a rotatable record sheet, a tracer, a pair of iressure` chalnbers, a shaft passing through both of said chambers, a pinion in each chamber mounted on said shaft, a float in each chamber positioned by the difference between the pressures at two points in the main pi ie, a rack connected to each float, said rac 's engaging said pinions, and means including said rack and pinion whereby the movement of said floats will continuously reeordfthe quantity passing through said main p1pe.

10. In a recording device the combination of a main supply pipe, a rotatablerecord sheet, a pivote tracing linger, a pair of pressure chambers, a shaft passing through both of said chambers, a iinion in each chamber` mounted on said shalt, a float in each cham# ber positioned by the ditl'erence between the pressures at two points inthe main pipe, a rack connected to each float said racks engagiIlfsY said pinions, anda cam also mounted on said shaft for controlling thc movement ot said tracer over the face of the. record sheet whereby the flow through said main pipe is continuously recorded.y

ll. In a recording device the combination of a rotatable. record sheet,- a tracer, a pair ot' adjacent pressure chambers, a shaft passing from one chamber into the other, a pinion in each chamber mounted on lsaid shaft, a lloat in each chamber positioned by the dill'erenee between the pressures at two points in the main pi e,`a rack connected to each tloat, said rac s engaging said pinions, and means including said rack and pinion whereby the mo'vement 'of said floats will continuously record .the quantity passing through said mam pipe.

12. In a recording device, the combination of a main supply pipe, a rotatable record sheet, a pivote( tracing finger, a pair of adjacent pressure chambers, a shaft passing through from one chamber into the other, a pinion in each chamber mounted on said shaft, a float in each chamber positioned by the difference between the pressures at two points in the main pipe, a rack connected to each float said racks engaging said pinious, and a cam also mounted on said shaft for controlling the movementiof said tracer over the lace of the record sheet. whereby the flow through said main pipe is continuouslyY recorded.

In testimony whereof I atlx my signature in presence of two witnesses.

FREDERICK Witnesses:

HOWARD E. BARLOW, E. I. OGDEN.

N. coNE'r. 

